The task of the autotransformers along the catenary line is to balance the voltages between the catenary and the earth, and the negative phase conductor and the earth, and then distribute the return current evenly between the two phases.
Autotransformers
Advantages compared to single phase feeding systems:
- Lower losses due to higher voltage
- Longer distance between catenary feeder substations
- Better collection of returning stray currents
- Reduced interference for communications
Product scope:
- Frequencies: 16.67, 25, 50, 60 Hz
- Power ratings: 4 - 15 MVA
- Single-phase
Why Hitachi Energy?
- Compactly designed, low weight transformers
- Solution for kiosk mounting with an integrated oil sump
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